→→→chemical reactions work sheet
1.define skeletal reaction
2.why reaction shoulkd be balanced
3.why nitroen is added to chips packets
4.give 5 methods to prevent rancidity
6.why hydrogen gas collected is double of oxygen gas in decomposition of water
7.element x reddish brown in colour when exposed to air becomes black compound y.
y on exposing to air reacts with hydregen to give back x.identiify x,y and write reactions to justify ur answer
8.define corrosion what happns when silver and copper exposed to air .write reactions to justify your answer.
9.zn+cuso₄ → cu+znso₄.identify who underwent
oxidation
oxidising agent
reduction and
reduciong agent
10.balance the reaction kclo₃ → kcl +o₂
11.why magnesium ribbon should be cleaned before combustion
1.define skeletal reaction
2.why reaction shoulkd be balanced
3.why nitroen is added to chips packets
4.give 5 methods to prevent rancidity
6.why hydrogen gas collected is double of oxygen gas in decomposition of water
7.element x reddish brown in colour when exposed to air becomes black compound y.
y on exposing to air reacts with hydregen to give back x.identiify x,y and write reactions to justify ur answer
8.define corrosion what happns when silver and copper exposed to air .write reactions to justify your answer.
9.zn+cuso₄ → cu+znso₄.identify who underwent
oxidation
oxidising agent
reduction and
reduciong agent
10.balance the reaction kclo₃ → kcl +o₂
11.why magnesium ribbon should be cleaned before combustion
12.what is colour of lead iodide ppt.write reaction of lead nitrate with potassium ioidide
13.whay should we balance reactions
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